<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>demo3</title>
    <style>
        @import "cs/a.css";
    </style>
    <script>
        var reg=/^\w{6,12}$/;

    </script>
</head>
<body>
    <form action="#" method="post">
        <table align="center" border="1">
            <tr>
                <td><label for="username">用户名</label></td>
                <td><input type="text" name="username" id="username" st></td>
            </tr>
            <tr>
                <td><label for="password">密码</label></td>
                <td><input type="password" name="password" id="password"></td>
            </tr>
            <tr>
                <td>性别</td>
                <td>
                    <input type="radio" name="gender" value="male" checked>男
                    <input type="radio" name="gender" value="female">女
                </td>
            </tr>
            <tr>
                <td>籍贯</td>
                <td>
                    <select name="address" >
                        <option value="zj">浙江</option>
                        <option value="sh" selected>上海</option>
                        <option value="bj">北京</option>
                    </select>
                </td>
            </tr>
        </table>
    </form>
</body>
</html>